<script>
    export default {
        data() {
            return {
                msg: "main组件"
            }
        }
    }     
</script>

<template>
<div>
    <p>{{ msg }}</p>
</div>
</template>

<style scoped>
    div {
        height: 100%;
        width: 100%;
        background-color: lightblue;
    }
</style>